Massage stone



FIG. 1 is a front left perspective view of a massage stone, according to the present invention;

FIG. 2 is a front elevation view of the massage stone of FIG. 1 ;

FIG. 3 is a rear elevation view of the massage stone of FIG. 1 ;

FIG. 4 is a right side elevation view of the massage stone of FIG. 1 ;

FIG. 5 is a left side elevation view of the massage stone of FIG. 1 ;

FIG. 6 is a top view of the massage stone of FIG. 1 ;

FIG. 7 is a bottom view of the massage stone of FIG. 1 ; and,

FIG. 8 is a right front perspective view of the massage stone of FIG. 1 .

Broken lines, where present, illustrate portions of the massage stone that form no part of the claimed design. 

CLAIM The ornamental design for a massage stone, as shown and described. 